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2Cu + O2 = 2CuO
CuCO3 --temp.--> CuO + CO2
b) tlenku wapnia
Ca(OH)2 --temp.--> CaO + H2O
2Ca + O2 = 2CaO
c) wodorotlenku potasu
K2O + H2O = 2KOH
2K + 2H2O = 2KOH + H2
d) tlenku węgla (IV)
C + O2 = CO2
2CO + O2 = 2CO2